COMPOSITAE NEW AND TRANSFERRED. 517 



4 mm. lati. CoroUae disci flavae in basi tubi ampliata etiam basi 

 faucium puberulae 5.5 mm. longae (tubo 1.2 mm.). Paleae supra 

 purpurascentes et strigillosae apice abrupte acuminatae 6.8 mm. 

 longae. Achaenia glabra substriata oblonga 3 mm. longa 1 mm. lata. 

 Pappus nullus. — Jalisco: mountains above Etzatlan, 2 Oct. 1903, 

 Pringle 11537 (type coll.: Kew). — Distributed as G. Ghiesbreghtii 

 Hemsl., but that has mainly opposite leaves whitened beneath with a 

 dense strigillosity. 



Haplocalymma Blake, n. genus Helianth.-Verhesin., Hymenostepldo 

 Benth. proximum, a quo involucro uniseriato 5-phyllo et foliis alternis 

 imprimis differt. — • Capitula heterogama radiata, floribus radii neutris 

 disci hermaphroditis fertilibus. Involucri subcampanulati bracteae 



5 uniseriatae oblongo-lanceolatae acuminatae adpressae apice paul- 

 lum patentes subherbaceae intus subinduratae 3-5-nerviae dense 

 strigosae flores radii subtendentes. Receptaculum parvulum con- 

 vexiusculum, paleis complicatis flores disci amplectentibus onus- 

 tum. Corollae radii 5 ligulatae flavae parvae o vales ca. 6-nerviae 

 emarginatae; disci ca. 16 regulares flavae puberulae tubo brevissimo 

 faucibus cylindricis apice 5-fidae. Antherae basi subauriculatae apice 

 appendice deltoideo-ovata flava munitae. Styli rami obtusiusculi 

 hirti non appendiculati. Achaenia radii abortiva; disci parva ob- 

 longa a latere subcompressa subsparse villosa. Pappus e squamellis 



6 hyalinis latis profunde laceratis duabus in angulis achaenii paullo 

 longioribus compositus. — Herba ramosa tenuis strigillosa, capitula 

 numerosa parvula in paniculis cymosis subdensis 3-5-cephalis ramos 

 dichotome ramosos terminantibus gerens. Folia (saltem media et 

 superiora) alterna ovata grosse sinuato-dentata dentibus acutissime 

 mucronatis. — Species unica Viguiera microcephala Greenm. 



Haplocalymma microcephalum (Greenm.) Blake, n. comb. — 

 Viguiera microcephala Greenm.! Proc. Am. Acad, xxxix. 105 (1903). — 

 Morelos: limestone hills near Yautepec, 7 Nov. 1902, Pringle 8717 

 (type coll.: Brit. Mus., Kew); near Cuernavaca, 1905, Lemmon 85 

 (Kew). 



The genus Haplocalymma (aTrXovs, simple, and Kokvixixa, covering, 

 from the uniseriate involucre) differs from its near ally Hymeno- 

 stephium Benth. of southern Mexico, Central America and Colombia 

 in its strictly uniseriate 5-leaved involucre (of 2-3 series in Hymeno- 

 stephium) and its alternate leaves, but in pappus characters agrees 

 perfectly with Hymenostephium angustifolium Benth. From Viguiera, 

 to which its relationship is rather less close, it may be distinguished by 

 the character of its pappus and involucre. The group of Viguiera 



